📏 Medical Tool
Body Surface Area (BSA) Calculator
Calculate your Body Surface Area using the Mosteller, DuBois, and Haycock formulas. BSA is an important metric used in clinical settings for medication dosing.
Calculate BSA
Mosteller Formula (Standard)
--m²
DuBois Formula
--
m²
Haycock Formula
--
m²
Gehan-George Formula
--
m²
What is Body Surface Area?
Body Surface Area (BSA) is the total surface area of the human body. In clinical environments, BSA is considered a more accurate indicator of metabolic mass than body weight because it is less affected by abnormal adipose (fat) mass.
Why is it used?
- Medication Dosing: Many medications, particularly chemotherapy drugs, are dosed based on BSA rather than body weight alone.
- Renal Function: The Glomerular Filtration Rate (GFR) is typically indexed to a standard BSA of 1.73 m².
- Cardiac Index: Used to assess heart function relative to patient size.
BSA Formulas Used
Mosteller (Most commonly used):
BSA = √ (Height(cm) × Weight(kg) / 3600)
DuBois and DuBois:
BSA = 0.007184 × Weight(kg)0.425 × Height(cm)0.725
Haycock (Often used for children):
BSA = 0.024265 × Weight(kg)0.5378 × Height(cm)0.3964
BSA = √ (Height(cm) × Weight(kg) / 3600)
DuBois and DuBois:
BSA = 0.007184 × Weight(kg)0.425 × Height(cm)0.725
Haycock (Often used for children):
BSA = 0.024265 × Weight(kg)0.5378 × Height(cm)0.3964